should the chips fill all the table cell width for clear alignment or is better to align them as they were a text element for better readability?
This is just an observation (no research), but the text readability seems about the same in either case.
All the chips are left aligned, so I can scan the column vertically and see the avatars and the names. Everything lines up in either choice.
Plus, if you're sticking to the 'chips' component, it's normal to see chips of varying widths.